CN101227233B - Method and apparatus for sending physics uplink control signal in TDD system - Google Patents

Method and apparatus for sending physics uplink control signal in TDD system Download PDF

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CN101227233B
CN101227233B CN 200810008661 CN200810008661A CN101227233B CN 101227233 B CN101227233 B CN 101227233B CN 200810008661 CN200810008661 CN 200810008661 CN 200810008661 A CN200810008661 A CN 200810008661A CN 101227233 B CN101227233 B CN 101227233B
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time
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gap number
subcarriers corresponding
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CN101227233A (en
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夏树强
梁春丽
郝鹏
戴博
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ZTE Corp
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ZTE Corp
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Abstract

The invention provides a method and a device for sending physical uplink control signals in a time-division duplex system, the method comprises following steps: encoding the uplink control signals with a communication channel to obtain coded bits, modulating the coded bits with QPSK to obtain modulation symbols, transforming the modulation symbols with DFT to obtain symbols on a frequency domain, expanding the symbols on the frequency domain with time-domain through adopting a CAZAC root sequence to respectively obtain a first signal and a second signal which are sent on two time slots, mapping the first signal and the second signal on an information symbol which is corresponded with a PUCCH reference signal structure 2, and combining the information symbol and the reference signal into a signal which will be sent by a sub-frame. The invention can well satisfy the performance requirement and the covering requirement that a plurality of ACK/NACK can be sent on an uplink sub frame.

Description

The sending method of physics uplink control signal in TDD system and device
Technical field
The present invention relates to the communications field, in particular to sending method and the device of physics uplink control signal in TDD system.
Background technology
The develop rapidly of digital communication system is had higher requirement to the reliability of data communication, yet, under abominable channel, especially in high data rate or the high-speed mobile environment, multipath interference and Doppler frequency shift etc. seriously affect systematic function, effective error-control technique, especially mixing automatic repeat request (Hybrid Automatic Repeat Request, HARQ) technology just becomes the focus that the communications field endeavours to study.
In the HARQ mode, the code of making a start and sending not only can error detection, but also has certain error correcting capability.After the receiving terminal decoder is received code word, at first check error situation, if in the error correcting capability of code, then automatically carry out error correction, if wrong a lot, surpassed the error correcting capability of code, but can detect mistake out, then receiving terminal is given the decision signal of making a start by feedback channel, requires to make a start retransmission of information.At OFDM (OrthogonalFrequency Division Multiplexing, OFDM) in the system, by ACK/NACK (Acknowledged/Non-acknowledged, the acknowledgement of acknowledgement/not) (being physics uplink control signal) represents to transmit correct/error, need to judge whether to retransmit with this.
When ack/nack signal does not send with upstream data, ack/nack signal will send at special Physical Uplink Control Channel PUCCH (Physical Uplink ControlCHannel).Current LTE (Long Term Evolution, Long Term Evolution) in the system, defined the reference signal structure of two kinds of PUCCH, respectively as shown in Figures 1 and 2, wherein accompanying drawing 1 mainly is for the format 0/1 (namely ack/nack signal) that sends PUCCH.Here illustrate in the LTE standard, can multiple format be arranged in the control signal that PUCCH sends, be respectively format 0～3, the reference signal structure 1 of PUCCH is used for carrying format0,1,3, and PUCCH reference signal structure 2 is used for carrying format 2.
PUCCH reference signal structure 1 is mainly used to loading ACK/nack message, but the information bit of ACK/NACK mostly is 2 most.In this schematic diagram, the PUCCH of 1ms comprises the time slot of 2 0.5ms, and two time slots lay respectively on up and down two frequency bands of system bandwidth at frequency domain.In the time slot of 0.5ms, when PUCCH uses the regular circulation prefix, comprised 7 symbols, be numbered #0～#6, each symbol has comprised again 12 subcarriers on frequency domain.Wherein 7 symbols have 3 to be used for sending reference signal (being numbered the symbol of #2～#4), and 4 are used for sending the ACK/NACK information (being numbered the symbol of #0, #1, #5, #6) that will carry.Adopt the PUCCH reference signal structure 1 shown in the accompanying drawing 1 to come loading ACK/nack message, its process of transmitting is as described below:
1. the ACK/NACK information of 1 bit/2 bits is carried out BPSK/QPSK (Binary Phase Shift Keying/Quaternary Phase Shift Keying, bi-phase shift keying/quadriphase PSK) modulation, obtain 1 modulation symbol.
2. first to carry out spreading factor at frequency domain be 12 spread spectrum (frequency expansion sequence is that length is 12 CAZAC root sequence) to modulation symbol, again time domain through one long be the time domain expansion of 4 Walsh code.
3. the signal map after the time-frequency expansion is gone to the information symbol of as shown in Figure 1 PUCCH structure 1 correspondence.
4. second time slot ACK/NACK information of carrying is identical with first time slot, but forms in the process of transmitted signal, and the Walsh sequence of using when the frequency expansion sequence that uses during frequency domain expansion and time domain expansion can be different from first time slot, also can be identical.
5. the data that at last form a subframe with reference signal send.
For Frequency Division Duplexing (FDD) (FDD:Frequency Division Duplex) system, because ascending-descending subframes is one to one, therefore, the ACK/NACK information bit that sends in a sub-frame of uplink is 1 bit or 2 bits, respectively corresponding 1 stream or 2 streams of downlink transfer.Therefore, for the FDD system, ack/nack signal adopts the PUCCH reference signal structure shown in the accompanying drawing 1 to send, and can satisfy the performance of ACK/NACK and cover requirement.
Yet in realizing process of the present invention, the inventor finds for time division duplex (TDD:Time Division Duplex) system, because the asymmetry of up-downgoing, such as when descending transmission subframe during more than the uplink subframe, just might in a sub-frame of uplink, send the ack/nack signal corresponding with a plurality of downlink transfer.When the information bit of the ACK/NACK that will in a sub-frame of uplink, feed back during more than or equal to 3 bit, if adopt the PUCCH structure of accompanying drawing 1 to send, then can only adopt higher modulation system to ACK/NACK, such as 8PSK or 16QAM or higher.But the mode that adopts high order modulation sends the words of ack/nack signal, because UE (User Equipment, subscriber equipment) is power limited, so just not necessarily can satisfy the performance requirement of ACK/NACK, and the ACK/NACK information bit that adopts this method to support also is very limited.
A kind of sending method also is provided in the prior art, has proposed a plurality of ack/nack signals are carried out absolute coding, used different code resources to send at identical running time-frequency resource.But the subject matter of this method is transmitted signal no longer is single-carrier signal, thereby will have higher PAR (Peak Average Rate, peak-to-average force ratio), and this also is disadvantageous to UE.
Summary of the invention
The present invention aims to provide sending method and the device of physics uplink control signal in a kind of TDD system, can solve in the prior art a plurality of ack/nack signals and carry out absolute coding and cause the higher problem of PAR.
In an embodiment of the present invention, provide the sending method of physics uplink control signal in a kind of TDD system, may further comprise the steps: uplink control signal is carried out chnnel coding obtain coded-bit; Coded-bit is carried out the QPSK modulation obtain a modulation symbol; Modulation symbol is carried out DFT (Discrete Fourier Transform, discrete Fourier transform) conversion, obtain the symbol on the frequency domain; Adopt CAZAC (ConstantAmplitude Zero Auto-Correlation, the permanent width of cloth zero auto-correlation) sequence to carry out the time domain expansion to the symbol on the frequency domain, obtain respectively the first signal and the secondary signal that send at two time slots; First signal and secondary signal are mapped on the PUCCH reference signal structure 2 corresponding information symbols; And information symbol is formed a subframe with reference signal want transmitted signal.
In an embodiment of the present invention, also provide the dispensing device of physics uplink control signal in a kind of TDD system, having comprised: coding module is used for that uplink control signal is carried out chnnel coding and obtains coded-bit; Modulation module is used for that coded-bit is carried out the QPSK modulation and obtains a modulation symbol; Conversion module is used for modulation symbol is carried out the DFT conversion, obtains the symbol on the frequency domain; Expansion module is used for adopting CAZAC root sequence to carry out the time domain expansion to the symbol on the frequency domain, obtains respectively the first signal and the secondary signal that send at two time slots; Mapping block is used for first signal and secondary signal are mapped to PUCCH reference signal structure 2 corresponding information symbols; And the framing module, be used for that information symbol is formed a subframe with reference signal and want transmitted signal.
The sending method of the above embodiment of the present invention and device are because adopt the format 2 of PUCCH to send physics uplink control signal, need not to adopt higher modulation system, and because what still adopt is single carrier, carry out absolute coding and cause the higher problem of PAR so solved in the prior art a plurality of ack/nack signals, and can satisfy well the performance requirement of ACK/NACK and cover requirement.
Description of drawings
Accompanying drawing described herein is used to provide a further understanding of the present invention, consists of the application's a part, and illustrative examples of the present invention and explanation thereof are used for explaining the present invention, do not consist of improper restriction of the present invention.In the accompanying drawings:
Fig. 1 shows the schematic diagram of PUCCH reference signal structure 1;
Fig. 2 shows PUCCH reference signal structure 2 schematic diagrames;
Fig. 3 shows the flow chart according to the sending method of the physics uplink control signal in TDD system of the embodiment of the invention;
Fig. 4 shows the according to the preferred embodiment of the invention flow chart of the sending method of physics uplink control signal in TDD system;
Fig. 5 shows the employed channel reference signal structure intention of signaling method of the embodiment of the invention;
Fig. 6 shows employed another channel reference signal structure intention of signaling method of the embodiment of the invention;
Fig. 7 shows the block diagram according to the dispensing device of the physics uplink control signal in TDD system of the embodiment of the invention.
Embodiment
Below with reference to the accompanying drawings and in conjunction with the embodiments, describe the present invention in detail.
Accompanying drawing 2 is used for sending the format 2 (namely channel quality indicator CQI (Channel Quality Indicator)) of PUCCH.In this schematic diagram, the PUCCH of 1ms comprises the time slot of 2 0.5ms, and two time slots lay respectively on up and down two frequency bands of system bandwidth at frequency domain.When PUCCH uses the regular circulation prefix, in the time slot of 0.5ms, comprised 7 symbols, be numbered #0～#6, each symbol has comprised again 12 subcarriers on frequency domain.Wherein 7 symbol number are #1 and #5 symbol is used for sending reference signal, #0, and these 5 of #2～#4 and #6 are used for sending the CQI information that will carry.Adopt the PUCCH reference signal structure 2 shown in the accompanying drawing 2 to carry CQI information, suppose that the CQI bit information that will send is M, its process of transmitting is as described below:
1. the M bit information is carried out chnnel coding, obtain 20 coded-bits.
2. coded-bit is carried out the QPSK modulation and obtain 10 modulation symbols.
3. each modulation symbol being carried out spreading factor is 12 frequency domain spread spectrum (frequency expansion sequence is 12 long CAZAC root sequences).
4. the signal map behind the spread spectrum is gone on the corresponding information symbol in the 1ms in the PUCCH reference signal structure 2 as shown in Figure 2, form a subframe with reference signal at last and want transmitted signal.
As from the foregoing, utilize PUCCH reference signal structure 2, can send the information of M bit.The present invention is based on above analysis sending method and the device of physics uplink control signal in TDD system are provided.
Fig. 3 shows the flow chart according to the sending method of the physics uplink control signal in TDD system of the embodiment of the invention, may further comprise the steps:
Step S10 carries out chnnel coding with uplink control signal and obtains coded-bit;
Step S20 carries out the QPSK modulation to coded-bit and obtains a modulation symbol;
Step S30 carries out the DFT conversion to modulation symbol, obtains the symbol on the frequency domain;
Step S40 adopts CAZAC root sequence to carry out the time domain expansion to the symbol on the frequency domain, obtains respectively the first signal and the secondary signal that send at two time slots;
Step S50 is mapped to first signal and secondary signal on the PUCCH reference signal structure 2 corresponding information symbols; And
Step S60 forms a subframe with information symbol with reference signal and wants transmitted signal.
The sending method of above-described embodiment is to adopt the reference signal structure 2 of PUCCH to carry a plurality of ACK/NACK information bits (being physics uplink control signal), so need not to adopt higher modulation system, and owing to still adopt single carrier, carry out absolute coding and cause the higher problem of PAR so solved in the prior art a plurality of ack/nack signals, and can satisfy well the performance requirement of ACK/NACK and cover requirement.
Suppose that the ACK/NACK information bit that will send in a sub-frame of uplink is M (M＞2), Fig. 4 shows the according to the preferred embodiment of the invention flow chart of the sending method of physics uplink control signal in TDD system; Fig. 5 shows the employed channel reference signal structure intention of signaling method of the embodiment of the invention; Fig. 6 shows employed another channel reference signal structure intention of signaling method of the embodiment of the invention.Specifically describe as follows:
1) the ACK/NACK information of M bit is carried out chnnel coding and obtain 24 coded-bit C (i), i=0,1 ..., 23.
2) to C (i), i=0,1 ..., 23 carry out the QPSK modulation obtains 12 modulation symbol S t(i), i=0,1 .., 11.
3) to S t(i), i=0,1 ..., 11 carry out the DFT conversion, transform to frequency domain, obtain S f(i), i=0,1 .., 11.
4) to 12 symbol S after the DFT conversion f(i), i=0,1 .., 11 to adopt length be that 5 CAZAC root sequence is carried out time domain and expanded, and obtains respectively the signal Z that sends at two time slots F1(i, k) and Z F2(i, k):
Z F1(i, k)=S f(i) .CAZAC (u 1, k) (formula 1)
Z F2(i, k)=S f(i) .CAZAC (u 2, k) (formula 2)
Wherein:
CAZAC ( u , k ) = exp ( - j 2 π N · uk ( k + 1 ) 2 )
N=5, u=1,2,3,4, k=0,1,2,3,4 (formulas 3)
i＝0，1，...，11
u 1And u 2It is the relevant parameter in residential quarter.
5) with the modulation symbol Z after the time domain expansion F1(i, k) and Z F2(i, k) is mapped to PUCCH reference signal structure 2 corresponding information symbols and gets on, namely:
When PUCCH uses the regular circulation prefix:
With Z F1(0:11,0) → be mapped to first time-gap number is on 12 subcarriers corresponding to the symbol of #0;
With Z F1(0:11,1) → be mapped to first time-gap number is on 12 subcarriers corresponding to the symbol of #2;
With Z F1(0:11,2) → be mapped to first time-gap number are on 12 subcarriers corresponding to the symbol of #3;
With Z F1(0:11,3) → be mapped to first time-gap number are on 12 subcarriers corresponding to the symbol of #4;
With Z F1(0:11,4) → be mapped to first time-gap number are on 12 subcarriers corresponding to the symbol of #6;
With Z F2On 12 subcarriers corresponding to the symbol that (0:11,0) → be mapped to second time-gap number is #0;
With Z F2On 12 subcarriers corresponding to the symbol that (0:11,1) → be mapped to second time-gap number is #2;
With Z F2On 12 subcarriers corresponding to the symbol that (0:11,2) → be mapped to second time-gap number are #3;
With Z F2On 12 subcarriers corresponding to the symbol that (0:11,3) → be mapped to second time-gap number are #4;
With Z F2On 12 subcarriers corresponding to the symbol that (0:11,4) → be mapped to second time-gap number are #6;
When PUCCH uses extended cyclic prefix:
With Z F1(0:11,0) → be mapped to first time-gap number is on 12 subcarriers corresponding to the symbol of #0;
With Z F1(0:11,1) → be mapped to first time-gap number is on 12 subcarriers corresponding to the symbol of #1;
With Z F1(0:11,2) → be mapped to first time-gap number are on 12 subcarriers corresponding to the symbol of #2;
With Z F1(0:11,3) → be mapped to first time-gap number are on 12 subcarriers corresponding to the symbol of #4;
With Z F1(0:11,4) → be mapped to first time-gap number are on 12 subcarriers corresponding to the symbol of #5;
With Z F2On 12 subcarriers corresponding to the symbol that (0:11,0) → be mapped to second time-gap number is #0;
With Z F2On 12 subcarriers corresponding to the symbol that (0:11,1) → be mapped to second time-gap number is #1;
With Z F2On 12 subcarriers corresponding to the symbol that (0:11,2) → be mapped to second time-gap number are #2;
With Z F2On 12 subcarriers corresponding to the symbol that (0:11,3) → be mapped to second time-gap number are #4;
With Z F2On 12 subcarriers corresponding to the symbol that (0:11,4) → be mapped to second time-gap number are #5.
6) form a subframe with reference signal at last and want transmitted signal.
Preferably, different UE uses the different cyclic shifts of same CAZAC root sequence.
Every long is that 5 CAZAC root sequence has 5 cyclic shifts, is mutually orthogonal between them, and therefore, this embodiment can provide 5 UE to send simultaneously a plurality of ack/nack signals on identical running time-frequency resource.
Preferably, use different CAZAC root sequences on each time slot, corresponding the time domain sequence spreading saltus step take time slot as unit enables, when enabling, and u 1≠ u 2Perhaps use identical CAZAC root sequence on each time slot, corresponding the time domain sequence spreading saltus step take time slot as unit does not enable, when not enabling, and u 1=u 2
Like this, the time domain used on each time slot expansion CAZAC root sequence can be used different CAZAC root sequences, also can use identical CAZAC root sequence, and also just corresponding the time domain sequence spreading saltus step take time slot as unit enables and do not enable two kinds of situations, when enabling, u 1≠ u 2, when not enabling, u 1=u 2
Preferably, when the time domain sequence spreading saltus step take time slot as unit enabled, different districts can use different saltus step patterns; And when the time domain sequence spreading saltus step take time slot as unit did not enable, different districts can use different CAZAC root sequences.This can realize the presence of intercell interference randomization.
In a word, it is multiplexing that the UE in the residential quarter can adopt the different cyclic shifts of same CAZAC root sequence to carry out, and the UE of minizone can also adopt different CAZAC root sequences, to realize further the presence of intercell interference randomization.
When the ACK/NACK information bit that will send changes, can realize by the chnnel coding of different code checks.Preferably, according to the information bit of uplink control signal the code check of chnnel coding is set, to obtain coded-bit be 24 so that carry out chnnel coding.
The sending method that adopts the above embodiment of the present invention to provide, need not to adopt higher modulation system, and the sending method of the above embodiment of the present invention remains and adopts single-carrier signal to send, carry out absolute coding and cause the higher problem of PAR so solved in the prior art a plurality of ack/nack signals, the method can satisfy well the performance requirement of ACK/NACK and cover requirement.
Fig. 7 shows the block diagram according to the dispensing device of the physics uplink control signal in TDD system of the embodiment of the invention, comprising:
Coding module 10 is used for that uplink control signal is carried out chnnel coding and obtains coded-bit;
Modulation module 20 is used for that coded-bit is carried out the QPSK modulation and obtains a modulation symbol;
Conversion module 30 is used for modulation symbol is carried out the DFT conversion, obtains the symbol on the frequency domain;
Expansion module 40 is used for adopting CAZAC root sequence to carry out the time domain expansion to the symbol on the frequency domain, obtains respectively the first signal and the secondary signal that send at two time slots;
Mapping block 50 is used for first signal and secondary signal are mapped to PUCCH reference signal structure 2 corresponding information symbols; And
Framing module 60 is used for that information symbol is formed a subframe with reference signal and wants transmitted signal.
The dispensing device of this embodiment is because adopt the format 2 of PUCCH to send physics uplink control signal, need not to adopt higher modulation system, and because what adopt is single carrier, carry out absolute coding and cause the higher problem of PAR so solved in the prior art a plurality of ack/nack signals, and can satisfy well the performance requirement of ACK/NACK and cover requirement.
Preferably, the information bit of uplink control signal is M, M＞2:
Coding module carries out chnnel coding to the uplink control signal of M bit and obtains 24 coded-bit C (i), i=0,1 .., 23;
Modulation module is to 24 coded-bit C (i), i=0, and 1 .., 23 carry out the QPSK modulation obtains 12 modulation symbol S t(i), i=0,1 ..., 11;
Conversion module is to 12 modulation symbol S t(i), i=0,1 ..., 11 carry out the DFT conversion, obtain the symbol S on the frequency domain f(i) i=0,1 ..., 11;
Expansion module is to the symbol S on the frequency domain f(i), i=0,1 ..., 11 to adopt length be that 5 CAZAC root sequence is carried out time domain and expanded, and obtains respectively the first signal Z that sends at two time slots F1(i, k) and secondary signal Z F2(i, k):
Z f1(i，k)＝S f(i).CAZAC(u 1，k)
Z f2(i，k)＝S f(i).CAZAC(u 2，k)
CAZAC ( u , k ) = exp ( - j 2 π N · uk ( k + 1 ) 2 )
Wherein: N=5, u=1,2,3,4, k=0,1,2,3,4
i＝0，1，...，11
u 1And u 2It is the relevant parameter in residential quarter;
When the framing module is used the regular circulation prefix as PUCCH:
When PUCCH uses the regular circulation prefix:
With Z F1(0:11,0) → be mapped to first time-gap number is on 12 subcarriers corresponding to the symbol of #0;
With Z F1(0:11,1) → be mapped to first time-gap number is on 12 subcarriers corresponding to the symbol of #2;
With Z F1(0:11,2) → be mapped to first time-gap number are on 12 subcarriers corresponding to the symbol of #3;
With Z F1(0:11,3) → be mapped to first time-gap number are on 12 subcarriers corresponding to the symbol of #4;
With Z F1(0:11,4) → be mapped to first time-gap number are on 12 subcarriers corresponding to the symbol of #6;
With Z F2On 12 subcarriers corresponding to the symbol that (0:11,0) → be mapped to second time-gap number is #0;
With Z F2On 12 subcarriers corresponding to the symbol that (0:11,1) → be mapped to second time-gap number is #2;
With Z F2On 12 subcarriers corresponding to the symbol that (0:11,2) → be mapped to second time-gap number are #3;
With Z F2On 12 subcarriers corresponding to the symbol that (0:11,3) → be mapped to second time-gap number are #4;
With Z F2On 12 subcarriers corresponding to the symbol that (0:11,4) → be mapped to second time-gap number are #6;
When PUCCH uses extended cyclic prefix:
With Z F1(0:11,0) → be mapped to first time-gap number is on 12 subcarriers corresponding to the symbol of #0;
With Z F1(0:11,1) → be mapped to first time-gap number is on 12 subcarriers corresponding to the symbol of #1;
With Z F1(0:11,2) → be mapped to first time-gap number are on 12 subcarriers corresponding to the symbol of #2;
With Z F1(0:11,3) → be mapped to first time-gap number are on 12 subcarriers corresponding to the symbol of #4;
With Z F1(0:11,4) → be mapped to first time-gap number are on 12 subcarriers corresponding to the symbol of #5;
With z F2On 12 subcarriers corresponding to the symbol that (0:11,0) → be mapped to second time-gap number is #0;
With Z F2On 12 subcarriers corresponding to the symbol that (0:11,1) → be mapped to second time-gap number is #1;
With Z F2On 12 subcarriers corresponding to the symbol that (0:11,2) → be mapped to second time-gap number are #2;
With Z F2On 12 subcarriers corresponding to the symbol that (0:11,3) → be mapped to second time-gap number are #4;
With Z F2On 12 subcarriers corresponding to the symbol that (0:11,4) → be mapped to second time-gap number are #5.
From above description, can find out, the sending method of the embodiment of the invention and device need not to adopt higher modulation system, and solved in the prior art a plurality of ack/nack signals and carry out absolute coding and cause the higher problem of PAR, so satisfy well the performance requirement of ACK/NACK and cover requirement.In addition, it is multiplexing that the UE in the residential quarter can adopt the different cyclic shifts of same CAZAC root sequence to carry out, and the UE of minizone can also adopt different CAZAC root sequences, and this can realize the presence of intercell interference randomization further.
Obviously, those skilled in the art should be understood that, above-mentioned each module of the present invention or each step can realize with general calculation element, they can concentrate on the single calculation element, perhaps be distributed on the network that a plurality of calculation elements form, alternatively, they can be realized with the executable program code of calculation element, thereby, they can be stored in the storage device and be carried out by calculation element, perhaps they are made into respectively each integrated circuit modules, perhaps a plurality of modules in them or step are made into the single integrated circuit module and realize.Like this, the present invention is not restricted to any specific hardware and software combination.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.

Claims (12)

1. the sending method of a physics uplink control signal in TDD system is characterized in that, may further comprise the steps:
Uplink control signal is carried out chnnel coding obtain coded-bit;
Described coded-bit is carried out the QPSK modulation obtain modulation symbol;
Described modulation symbol is carried out the DFT conversion, obtain the symbol on the frequency domain;
Adopt CAZAC root sequence to carry out the time domain expansion to the symbol on the described frequency domain,
Obtain respectively the first signal and the secondary signal that send at two time slots;
Described first signal and described secondary signal are mapped on the PUCCH reference signal structure 2 corresponding information symbols; And
Described information symbol is formed a subframe with reference signal want transmitted signal.
2. sending method according to claim 1 is characterized in that, the information bit of described uplink control signal is M, and M＞2 are carried out chnnel coding with uplink control signal and obtained coded-bit and specifically comprise:
The described uplink control signal of M bit is carried out chnnel coding obtain 24 described coded-bit C (i), i=0,1 ..., 23.
3. sending method according to claim 2 is characterized in that, described coded-bit is carried out QPSK modulation obtain a modulation symbol and specifically comprise:
To 24 described coded-bit C (i), i=0,1 ..., 23 carry out the QPSK modulation obtains 12 described modulation symbol S t(i), i=0,1 ..., 11.
4. sending method according to claim 3 is characterized in that, described modulation symbol is carried out the DFT conversion, and the symbol that obtains on the frequency domain specifically comprises:
To 12 described modulation symbol S t(i), i=0,1 ..., 11 carry out the DFT conversion, obtain the symbol S on the described frequency domain f(i), i=0,1 ..., 11.
5. sending method according to claim 4 is characterized in that, adopts CAZAC root sequence to carry out the time domain expansion to the symbol on the described frequency domain, and the first signal and the secondary signal that obtain respectively sending at two time slots specifically comprise:
To the symbol S on the described frequency domain f(i), i=0,1 ..., 11 to adopt length be that 5 described CAZAC root sequence is carried out time domain and expanded, and obtains respectively the described first signal Z that sends at two time slots F1(i, k) and described secondary signal Z F2(i, k):
Z f1(i，k)＝S f(i).CAZAC(u 1，k)
Z f2(i，k)＝S f(i).CAZAC(u 2，k)
Wherein:
CAZAC ( u , k ) = exp ( - j 2 π N · uk ( k + 1 ) 2 )
N＝5，u＝1，2，3，4，k＝0，1，2，3，4
i＝0，1，...，11
u 1And u 2It is the relevant parameter in residential quarter.
6. sending method according to claim 5 is characterized in that, described first signal and described secondary signal is mapped on the PUCCH reference signal structure 2 corresponding information symbols specifically comprise:
When PUCCH uses the regular circulation prefix:
With Z F1(0:11,0) → be mapped to first time-gap number is on 12 subcarriers corresponding to the symbol of #0;
With Z F1(0:11,1) → be mapped to first time-gap number is on 12 subcarriers corresponding to the symbol of #2;
With Z F1(0:11,2) → be mapped to first time-gap number are on 12 subcarriers corresponding to the symbol of #3;
With Z F1(0:11,3) → be mapped to first time-gap number are on 12 subcarriers corresponding to the symbol of #4;
With Z F1(0:11,4) → be mapped to first time-gap number are on 12 subcarriers corresponding to the symbol of #6;
With Z F2On 12 subcarriers corresponding to the symbol that (0:11,0) → be mapped to second time-gap number is #0;
With Z F2On 12 subcarriers corresponding to the symbol that (0:11,1) → be mapped to second time-gap number is #2;
With Z F2On 12 subcarriers corresponding to the symbol that (0:11,2) → be mapped to second time-gap number are #3;
With Z F2On 12 subcarriers corresponding to the symbol that (0:11,3) → be mapped to second time-gap number are #4;
With Z F2On 12 subcarriers corresponding to the symbol that (0:11,4) → be mapped to second time-gap number are #6;
When PUCCH uses extended cyclic prefix:
With Z F1(0:11,0) → be mapped to first time-gap number is on 12 subcarriers corresponding to the symbol of #0;
With Z F1(0:11,1) → be mapped to first time-gap number is on 12 subcarriers corresponding to the symbol of #1;
With Z F1(0:11,2) → be mapped to first time-gap number are on 12 subcarriers corresponding to the symbol of #2;
With Z F1(0:11,3) → be mapped to first time-gap number are on 12 subcarriers corresponding to the symbol of #4;
With Z F1(0:11,4) → be mapped to first time-gap number are on 12 subcarriers corresponding to the symbol of #5;
With Z F2On 12 subcarriers corresponding to the symbol that (0:11,0) → be mapped to second time-gap number is #0;
With Z F2On 12 subcarriers corresponding to the symbol that (0:11,1) → be mapped to second time-gap number is #1;
With Z F2On 12 subcarriers corresponding to the symbol that (0:11,2) → be mapped to second time-gap number are #2;
With Z F2On 12 subcarriers corresponding to the symbol that (0:11,3) → be mapped to second time-gap number are #4;
With Z F2On 12 subcarriers corresponding to the symbol that (0:11,4) → be mapped to second time-gap number are #5.
7. sending method according to claim 1 is characterized in that, adopts CAZAC root sequence to carry out the time domain expansion to the symbol on the described frequency domain, and the first signal and the secondary signal that obtain respectively sending at two time slots specifically comprise:
Different subscriber equipmenies uses the different cyclic shifts of same CAZAC root sequence to carry out the time domain expansion.
8. sending method according to claim 5 is characterized in that, adopts CAZAC root sequence to carry out the time domain expansion to the symbol on the described frequency domain, and the first signal and the secondary signal that obtain respectively sending at two time slots specifically comprise:
Use different CAZAC root sequences on each time slot, corresponding the time domain sequence spreading saltus step take time slot as unit enables, when enabling, and u 1≠ 2Perhaps
Use identical CAZAC root sequence on each time slot, corresponding the time domain sequence spreading saltus step take time slot as unit does not enable, when not enabling, and u 1=u 2
9. sending method according to claim 8 is characterized in that, adopts CAZAC root sequence to carry out the time domain expansion to the symbol on the described frequency domain, and the first signal and the secondary signal that obtain respectively sending at two time slots specifically comprise:
When the time domain sequence spreading saltus step take time slot as unit enabled, different districts used different saltus step patterns;
And when the time domain sequence spreading saltus step take time slot as unit did not enable, different districts used different CAZAC root sequences.
10. sending method according to claim 1 is characterized in that, uplink control signal is carried out chnnel coding obtain coded-bit and specifically comprise:
According to the information bit of described uplink control signal the code check of described chnnel coding is set, to obtain coded-bit be 24 so that carry out chnnel coding.
11. the dispensing device of a physics uplink control signal in TDD system is characterized in that, comprising:
Coding module is used for that uplink control signal is carried out chnnel coding and obtains coded-bit;
Modulation module is used for that described coded-bit is carried out the QPSK modulation and obtains modulation symbol;
Conversion module is used for described modulation symbol is carried out the DFT conversion, obtains the symbol on the frequency domain;
Expansion module is used for adopting CAZAC root sequence to carry out the time domain expansion to the symbol on the described frequency domain, obtains respectively the first signal and the secondary signal that send at two time slots;
Mapping block is used for described first signal and described secondary signal are mapped to PUCCH reference signal structure 2 corresponding information symbols; And
The framing module is used for that described information symbol is formed a subframe with reference signal and wants transmitted signal.
12. dispensing device according to claim 11 is characterized in that, the information bit of described uplink control signal is M, M＞2:
Described coding module carries out chnnel coding to the described uplink control signal of M bit and obtains 24 described coded-bit C (i), i=0, and 1 ..., 23;
Described modulation module is to 24 described coded-bit C (i), i=0, and 1 ..., 23 carry out the QPSK modulation obtains 12 described modulation symbol S t(i), i=0,1 ..., 11;
Described conversion module is to 12 described modulation symbol S t(i), i=0,1 ..., 11 carry out the DFT conversion, obtain the symbol S on the described frequency domain f(i), i=0,1 ..., 11;
Described expansion module is to the symbol S on the described frequency domain f(i), i=0,1 ..., 11 to adopt length be that 5 described CAZAC root sequence is carried out time domain and expanded, and obtains respectively the described first signal Z that sends at two time slots F1(i, k) and described secondary signal Z F2(i, k):
Z f1(i，k)＝S f(i).CAZAC(u 1，k)
Z f2(i，k)＝S f(i).CAZAC(u 2，k)
Wherein:
CAZAC ( u , k ) = exp ( - j 2 π N · uk ( k + 1 ) 2 )
N＝5，u＝1，2，3，4，k＝0，1，2，3，4
i＝0，1，...，11
u 1And u 2It is the relevant parameter in residential quarter;
When described framing module is used the regular circulation prefix as PUCCH:
With Z F1(0:11,0) → be mapped to first time-gap number is on 12 subcarriers corresponding to the symbol of #0;
With Z F1(0:11,1) → be mapped to first time-gap number is on 12 subcarriers corresponding to the symbol of #2;
With Z F1(0:11,2) → be mapped to first time-gap number are on 12 subcarriers corresponding to the symbol of #3;
With Z F1(0:11,3) → be mapped to first time-gap number are on 12 subcarriers corresponding to the symbol of #4;
With Z F1(0:11,4) → be mapped to first time-gap number are on 12 subcarriers corresponding to the symbol of #6;
With Z F2On 12 subcarriers corresponding to the symbol that (0:11,0) → be mapped to second time-gap number is #0;
With Z F2On 12 subcarriers corresponding to the symbol that (0:11,1) → be mapped to second time-gap number is #2;
With Z F2On 12 subcarriers corresponding to the symbol that (0:11,2) → be mapped to second time-gap number are #3;
With Z F2On 12 subcarriers corresponding to the symbol that (0:11,3) → be mapped to second time-gap number are #4;
With Z F2On 12 subcarriers corresponding to the symbol that (0:11,4) → be mapped to second time-gap number are #6;
When PUCCH uses extended cyclic prefix:
With Z F1(0:11,0) → be mapped to first time-gap number is on 12 subcarriers corresponding to the symbol of #0;
With Z F1(0:11,1) → be mapped to first time-gap number is on 12 subcarriers corresponding to the symbol of #1;
With Z F1(0:11,2) → be mapped to first time-gap number are on 12 subcarriers corresponding to the symbol of #2;
With Z F1(0:11,3) → be mapped to first time-gap number are on 12 subcarriers corresponding to the symbol of #4;
With Z F1(0:11,4) → be mapped to first time-gap number are on 12 subcarriers corresponding to the symbol of #5;
With Z F2On 12 subcarriers corresponding to the symbol that (0:11,0) → be mapped to second time-gap number is #0;
With Z F2On 12 subcarriers corresponding to the symbol that (0:11,1) → be mapped to second time-gap number is #1;
With Z F2On 12 subcarriers corresponding to the symbol that (0:11,2) → be mapped to second time-gap number are #2;
With Z F2On 12 subcarriers corresponding to the symbol that (0:11,3) → be mapped to second time-gap number are #4;
With Z F2On 12 subcarriers corresponding to the symbol that (0:11,4) → be mapped to second time-gap number are #5.
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